diff --git a/.gitignore b/.gitignore
index 51a9ca1d2..d2927298b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,6 @@ docs/_build
 build/
 dist/
 mongoengine.egg-info/
-env/
\ No newline at end of file
+env/
+.project
+.pydevproject
\ No newline at end of file
diff --git a/mongoengine/base.py b/mongoengine/base.py
index 6b74cb072..ac15df6f1 100644
--- a/mongoengine/base.py
+++ b/mongoengine/base.py
@@ -491,6 +491,7 @@ def __eq__(self, other):
 
 if sys.version_info < (2, 5):
     # Prior to Python 2.5, Exception was an old-style class
+    import types
     def subclass_exception(name, parents, unused):
         return types.ClassType(name, parents, {})
 else: